Le 13/09/2014 20:38, Nir Soffer a écrit :
----- Original Message -----
From: "Nicolas Ecarnot" <nico...@ecarnot.net>
To: "Nir Soffer" <nsof...@redhat.com>
Cc: users@ovirt.org, "Federico Simoncelli" <fsimo...@redhat.com>
Sent: Saturday, September 13, 2014 9:24:55 PM
Subject: Re: [ovirt-users] [RFI] oVirt 3.6 Planning
Le 13/09/2014 17:34, Nir Soffer a écrit :
For God's sake, please, prevent "secondary" storage domains (anything
other than the master, especially iso and export) to completely block
the whole thing when being unavailable.
To many users suffered from this in the last two years I participate at
this mailing list (including me).
I think this is true for ISO and export domains for some time.
In 3.4 at least, this is still true and is a problem.
At least, if we can get rid of this and just mark these iso and export
domains as unusable, and still do every other non-related operations,
this would be very useful.
It will not work for data domains - if you have vms with disks on what you
call "secondary" data domain, how would you migrate these vms to a host
that
cannot see the "secondary" domain?
In 3.6, there will be no "master" domain, so any data domain will be
important
as any other data domain.
Maybe what do you like is to have more control on which domains are
critical,
and which are not. A domain which you mark as "non-critical", or
"secondary",
will not cause the host to become non-operational when the host cannot see
this domain.
So you would not be able to migrate some vms to a host that cannot see the
secondary domain, but since *you* marked it as "secondary", it is not a
problem
for you.
What do you think?
This proposition is perfect.
I don't know whether being able to mark some storage domain as more
precious than other will be useful, when their absence won't be a
blocker anymore?
The idea is to let you define which storage domains are "required" and
which are not, lets call them "optional".
If a required storage domain cannot be seen, a host be become
non-operational.
If an optional storage domain cannot be seen, you will get a warning
but the host will function normally.
If you try to migrate a vm to a host which cannot see the storage
domain used by that vm, the operation will fail.
When a "required" storage domain is down, you would be able to
change it to "optional", and continue to work with the other
domains in degraded mode. Some vms will not able to run, but
other vms that do not depend on problem domain will not be
affected.
I hope that I understood your question correctly.
Nir
You did, and the features you described seem great.
Can't wait to see them released!
--
Nicolas Ecarnot
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